#!/usr/bin/python
# -*- coding: utf-8 -*-
#===============================================================================
# Copyright 2011 zod.yslin
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# Author: zod.yslin
# Email: 
# File Name: concatenation_shallow_copy.py
# Description: 
#   s * n, n * s, n shallow copies of s concatenated
# Edit History: 
#   2011-08-13    File created.
#===============================================================================
print("-" * 10)  # ----------
print(10 * "-")  # ----------

lists = [[]] * 3
print(lists)  # [[], [], []]
lists[0].append(3)
print(lists)  # [[3], [3], [3]]

lists = [[] for i in range(3)]
lists[0].append(3)
lists[1].append(5)
lists[2].append(7)
print(lists)  # [[3], [5], [7]]
